[kbuild-all] [tip:tmp.tmp2 181/364] arch/x86/include/asm/page_64_types.h:75:21: error: implicit declaration of function 'test_thread_flag'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: ce4bb9d9b7175b1ac35cc13dd65b06aed1cb4fdd [181/364] sched/headers, x86/mm: Remove <linux/thread_info_api.h> from <asm/elf.h> config: x86_64-kexec (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=ce... git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout ce4bb9d9b7175b1ac35cc13dd65b06aed1cb4fdd # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/x86/include/asm/page_types.h:46, from arch/x86/include/asm/page.h:9, from arch/x86/include/asm/spinlock.h:7, from include/linux/spinlock.h:91, from include/linux/mmzone.h:8, from include/linux/gfp.h:7, from include/linux/mm.h:12, from include/linux/mman.h:5, from lib/test_user_copy.c:13: lib/test_user_copy.c: In function 'test_user_copy_init': 75 | #define TASK_SIZE (test_thread_flag(TIF_ADDR32) ? \ | ^~~~~~~~~~~~~~~~ lib/test_user_copy.c:201:35: note: in expansion of macro 'TASK_SIZE' 201 | if (user_addr >= (unsigned long)(TASK_SIZE)) { | ^~~~~~~~~ cc1: some warnings being treated as errors vim +/test_thread_flag +75 arch/x86/include/asm/page_64_types.h 999c83e8ffd90c Christoph Hellwig 2020-09-03 66 999c83e8ffd90c Christoph Hellwig 2020-09-03 67 /* This decides where the kernel will search for a free chunk of vm 999c83e8ffd90c Christoph Hellwig 2020-09-03 68 * space during mmap's. 999c83e8ffd90c Christoph Hellwig 2020-09-03 69 */ 999c83e8ffd90c Christoph Hellwig 2020-09-03 70 #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \ 999c83e8ffd90c Christoph Hellwig 2020-09-03 71 0xc0000000 : 0xFFFFe000) 999c83e8ffd90c Christoph Hellwig 2020-09-03 72 999c83e8ffd90c Christoph Hellwig 2020-09-03 73 #define TASK_SIZE_LOW (test_thread_flag(TIF_ADDR32) ? \ 999c83e8ffd90c Christoph Hellwig 2020-09-03 74 IA32_PAGE_OFFSET : DEFAULT_MAP_WINDOW) 999c83e8ffd90c Christoph Hellwig 2020-09-03 @75 #define TASK_SIZE (test_thread_flag(TIF_ADDR32) ? \ 999c83e8ffd90c Christoph Hellwig 2020-09-03 76 IA32_PAGE_OFFSET : TASK_SIZE_MAX) 999c83e8ffd90c Christoph Hellwig 2020-09-03 77 #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_ADDR32)) ? \ 999c83e8ffd90c Christoph Hellwig 2020-09-03 78 IA32_PAGE_OFFSET : TASK_SIZE_MAX) 999c83e8ffd90c Christoph Hellwig 2020-09-03 79 :::::: The code at line 75 was first introduced by commit :::::: 999c83e8ffd90caa00ee6caf054e037cf8a27d0e x86: move PAGE_OFFSET, TASK_SIZE & friends to page_{32,64}_types.h :::::: TO: Christoph Hellwig <hch(a)lst.de&gt; :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org